Universal rivet holder-on jam



1. H. SCHMIDT AND L. AHLERS. UNIVERSAL RIVET HOLDER-0N JAM.

APPLICATION FILED :un 20,1920.

/A/ VEN roms.

' ArraAM/EK 1.;H. SCHMIDT AND L.-AHLERS.' UNIVERSAL RIVET HOLDER-0N JAM.

.A'PPLICATION FILED JUL.Y'20,1920. I

'Patented Dec. 20, y1921.

2 SHEETS--SHEET 2.

UNTED STATES Pif-WENTV OFFICE.

JOHN Hf SCHMIDT .ANDy LOUIS AHLEB-S, HARRIMAN, PENNSYLVANIA.

UNIVERSAL RIVET HOLDER-0N JAM.

Application led July 20,

' peoially when working upon channel irons an operator is provided with a goose-neck holder-on die which is connected with a source of compressed air. The operator usually stands upon a scaffold beneath an operator provided with a riveting gun and presses the holder-on die against the underside ot' a rivet during;` the heading` process. Practice dictates that because of the incessant vibration referred. to the holder-On die,

many imperfect and non-watertight joints result. Stated otherwise concussion of the riveting' @jun forces the holder-on die away from the rivet being' headed. Practice also dictates that standing upon a. scatllold beneath a rivet being headed is a more or less dangerous positiontor the operator. Also the employment of compressed air in connection with the holder-on die increases cost Ot' production.

The leading object of the present invention may be said to'reside in the overcoming of the above described disadvantageous teatures and provide a new and novel type of device designed to replace a holder-On die whereby a better grade Ot rivetingl may be edected with less labor and at lower cost than practised under the old method. Another object is to attain increased production and provide tor the safety of operators employing the device. A further object is to provide a holder-On j am which is fixed with respect to the ,riveting gun or otherwise stated provide an anvil and hammer relation of parts thus eliminating concussion of the riveting gun tending to force the holderon j am away from the rivet being headed.

With these and other Objects in view, as will subsequently appear, the invention consists oi the improvements hereinafter described and finally claimed,

Specification of Letters Patent. p Patented Dec. 20, 1921.

1920. Serial No. 397,708.

The nature, characteristic features and scope of the invention will be more fully understood `from the following description taken in connection with the accompanying` drawings forming part hereof, and in which:

Figure l', is a view in side'elevation, partly sectioned of a holder-On jam in operative position beneath a rivet the heading` Oi which has been completed.

Fig. 2, is a view in cross-section illustrating the position of p-arts when the operating leverhas been returned to inoperative posi'- ti on and v Figs. 3 and 4l are detached views of certain of the parts shown in the foregoing' figures.

For the purpose of illustrating our invention, we have shown in the accompanying drawings one form thereof which is at present preferred by us, since rthe same has. been :found in practice to give satisfactory and reliable results, although it is to be understood that thervarious instrumentalities ot which our invention consists can -be variously arranged (and organized and that our invention is not limited to the precise arrangement and organization of the instrumeutalities as herein' shown and described. Y

ln the drawings l0 designates a supportingframe which7 considered .in plan.y is substantially U-shaped, and comprises sido plates ll and an end plate 12. Mounted within said frame for slidable movement in a direction parallel with'. said side and end plates is a rectangular head lf3 baiting;r a socket therein to receive the shank le of a removable die 15a hereinafter referred to. The oute'rface of said head 13, is provided with a' rack-bar 16 adapted to mesh with which are teeth 17 arranged segmental fash ion upon@ pivotally mounted member In practice the side plates 1l terminatein ears 19 which are apertured to receive a pin 2() upon which is mounted the member 18. Cotter-pins 2l are employed to retain the pin 20 in place. The member 18 terminates in an extension 22 provided at its end with a socket 23 to receive an` Operating handle 24 which may be retained in any desired manner. In practice the handle. which may be piping or other suitable material is apertured as is the wall of the socket 23 and a pin 25 is caused to engage said apertured parts for interlocking the handle with respect to the socket. The extension 2.2 is of irregular or goose-neel; ccnilguraa rivet head as usual. Y

ber 13 and die being firmly positioned function as at 264 so that the device may be maintain the operating handle .from re"v spending` to the 'force of gravity,Y

before and after a rivet-head has been iormed` the member 18 is provided with a spring pressed detent 2G adaptedV to oo-act with adepression 27 in oneroi the sideeplates l1. rlhis position is shown in Fig. 2. ln order to lighten construction 'the side'and end plates are cut away as at 27.

The above described device comprises rivet-holdereon jam particularly adapted for Work in conjunction with channel irons although it is capable of universal use.` lFor illustrative purposes its use in conjunctionwith channel iron will nowy be described. 28 designates a channel iron and 29 a'piece to be riveted thereto. The device oi the invention, with a die fitted thereto,'is'placed in proper position, for instance as 'shown in Fig. 1,3beneath the parts to beriveted.

The frame i is thus supported vvithin the channel iron 28, the operating handlebeing held against gravitation by reason of detent 26'.' A rivet then being` properly. positioned as usual the holder-on jam operator causes the detent 26 to release the operating handle so that by reason of the segmental raclrand rack bar he can raise the die llto engage the part 30 ot the rivet and securely-hold said die in tnat position While anotherper- :ttor-provided with a rivetin @un fashions e rlhe frame i0, memtion much as does an anvil against the hammer that perfect, vvater tight rivet joints are ettfected. The operating handle maybe oli' any desired length so that scaiiolds Vmay be dispensed Withthus removing the holderon jam operator from danger zones and further relieving him or shock and concus sion as 'experienced when holding the conventional vgoose-neck die against the ltorce of a riveting gun'. lil-case the device is not used in conjunction viv/ith channel iron Wort: a temporary structure ofany desired construction Imay be made to support the holder-on jam in position with respect to Work to beriveted; It frequently happens that the sh'anlrsot thedies used in rivetingguns become broken oit sothat they are useless for that purpose. By -re-cupping such dies to fit the-part l30 of a rivet said dies may bereadily employed in connection with blows of the riveter with the result ahead 13 ot the holdereon'jam of the Vpresent invention. Y Y y It will novT be apparent that vWe have devised novelv and useful construction shown 'and described the preferred embodiment thereof which has been found in practice to give satistactory and reliable rersuits, it is to be understood that the saine is susceptible oit*modification in various particulars Without departing from the spirit or scope of the invention or sacrificing any of its advantages. l,what We vclaim is: y y y L A holder-on jam comprising a supporting trame, a head movable through said traine, said head being shaped and proportioned to receive a die, a rack-bar for said head, a member provided with a segmental toothed portion member for cooperatively engagingV said rack-bar pivoted to said Yframe, means arranged between said frame and member for supporting said member in inoperative position and an operating handle connected to said member;

2. A. holder-on -j'am comprising a supporting frame, ahead provided with an opening to receive the shank of a die movable through said frame, a rack-bar tor saidhead, a meinberprovided With a segmental toothed portiony 'for cooperativelyY engaging said raclr-bar'pivoted Within said Yframe, said. member terminating. in a gooseneck provided .With a socket, an operating handleiitted to said socket and a'spring pressed detent carried by said member for cooperatively engaging With said trame to support said member and handle in inoperative position. Y Y

3. A holder-'on `jam 'comprising a supporting trame, a head movable'through said frame, said headbeing shaped andpropor-V tioned to vreceive la die, a rack-bar 'for said head, a member provided with `a "toothed portion for cooperatively engaging said rack-bar movably connected With're'spect to said trame anda "spring kpressed det-ent `carried by said member for coperatively gaging With said v'trame to ksupport said member in inoperative position, i

in testimony whereof, 'vvel'have hereunto signed our names. Y o

' JQHN H. SCHMDT.

i LOUIS AHLERS.V 

